CAS 2439-02-3 appears in our catalog under these names: Kynurenic acid sodium 98%, Sodium 4-hydroxyquinoline-2-carboxylate, Kynurenic acid (sodium), 99.82%, Kynurenic acid (sodium) (Standard). Offered by: Ambeed, Chemat, MedChemExpress. Available pack sizes: 100mg, 250mg, 1g, 10mM/1mL, 10 g, 500 mg, 1 g, 100 mg.